Overwintering Potted Alstroemeria in Illinois: Garage Storage Method

Alstroemeria (Peruvian lily) is marginally hardy to zone 7; in Illinois (zone 5/6), pots need protection.

Garage Overwintering

1. After frost kills tops, cut dead growth.
2. Move pots to unheated garage/shed.
3. Mulch pot surface heavily (leaves, straw).
4. Check monthly—water lightly if bone dry.
5. Do not dig rhizomes—they're brittle.

Spring Restart

• After last frost, move outdoors.
• Water and feed with composted manure.
• 'Mathilde Princess' and 'Theresa Princess' are vigorous cultivars.

Why Not Lift Rhizomes?

Fleshy, brittle roots break easily—container storage preserves integrity better.